package com.example.demo.common;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: WHY
 * Date: 2023-09-17
 * Time: 10:13
 */

import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.SneakyThrows;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * 保底统一返回值处理
 */
@ControllerAdvice
public class ResponseAdvice implements ResponseBodyAdvice {
    @Autowired
    private ObjectMapper objectMapper;

    @Override
    public boolean supports(MethodParameter returnType, Class converterType) {
        return true;
    }

    @SneakyThrows
    @Override
    public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType, Class selectedConverterType, ServerHttpRequest request, ServerHttpResponse response) {
       if(body instanceof ResultAjax){
           return body;
       }
       if(body instanceof String){
           ResultAjax resultAjax=ResultAjax.success(body);
           return objectMapper.writeValueAsString(resultAjax);
       }
       return ResultAjax.success(body);

    }
}
